Combined door holder and burglar alarm



Aug. 24, R94. J. E. OLVlS 2,447,526

COMBINED DOOR HOLDER AND BURGLAR ALARM Filed March so, 1946 INVENTOR,

Patented Aug. 24, 1948 warren STATES James E..0i'vis, Glendale, Calif.

Application March 30, 1946, Serial No- 658,454

8 Claims. (Cl. 116-431) This invention relates to a combined door holder and burglar alarm.

More specifically speaking the invention pertains to a type of audible door-operable alarm wherein the casing which contains the alarm is mounted upon a swingable door, which door may be set in a more or less open position but which, when opened from certain set positions sufiiciently to admit a. person through the door opening, will cause the alarm to sound.

It is'an object' of theinvention to provide a simplified combination of mounting means and actuating means for the alarm proper which means can be conveniently mounted over the door opening and upon the freeedge portion of a door of a building.

Another object is to provide an improved door holder arm which has a novel and more advantageous arrangement of door-setting shoulders and which is more conveniently adjustable to and from an inoperative position.

Still another object is to provide an improved means for setting and holding a door in a slightly open position to secure better ventilation, while at the same time preventing unauthorized persons from passing through the door opening without sounding an alarm.

Other objects, advantages and features of invention will hereinafter appear.

Referring to the accompanying drawing which illustrates a preferred embodiment of the invention,

Fig. 1 is a fragmental perspective view showing the device in a position wherein the alarm is sounding by reason of an opening movement having been given to the door beyond that for which the door was set; the alarm ceasing to sound if the door is closed.

Fig. 2 is a fragmental, vertical sectional view of the door holder mounting mechanism.

Fig. 3 is a reproduction of a portion of Fig. 1 showing the parts differently adjusted.

Fig. 4 is aview of the outer end portion of the door holder arm showing said arm adjusted to a still diiTer'ent position wherein it holds the door ajar for ventilation but is in an inoperative relation to the alarm.

Fig. 5 is a fragmental side elevation showing the door holder swung to its inoperative position.

Referring in detail to the drawing, the door 7 is shown hinged to one of the vertical side portions of a door frame 8, a bracket consisting of a strap metal clip 9 being fastened to said door frame above the door opening i ii adjacent to that side of said door opening that is farthest from the hinged edge of the door. To said bracket is anchored one end of a door holding arm 5 l which can be tilted vertically and swung laterally. The free or outer end portion of said arm cooperates with an alarm actuating means E2 in an operativerelation to the alarmproper i3, said means i2 and alarm is both being secured to the part of the outer face of the door which is adjacent to the doors free edge. I Y The alarm proper is furnishedwith an up tvardly projecting sleeve i l withinwhich operates a spring-pressed headed plunger is normally maintained by its spring at the upward limit of its travel so that the alarm does not sound unless said plunger is depressed against the opposition of its spring. An alarm actuating lever it normally rests lightly upon the upper, headed end of the aforesaid plunger 55, not pressing thereagainst with sufficient force to set off thealarm. Gne end of said lever 56 is pivoted at 9-30: with a working fit in a channel shaped ear i'i' carried by a rectangularly U-shaped upper part it of a bracket plate or apron 59, this bracket plate being attachedto the outer face of the door by any suitable means, for example by screws and its lower part providing also a mounting means for the alarm proper Hi. It Will be seen that the mounting arms for the lever it are integral with the upper corner portions of the bracket plate is. 1 Adjacent to the free edge of the upper part of the door the part it has an outwardly directed arm 2! furnished at its outer end with an up wardly directed finger 22 immediately behind which there is a deep notch 23 in the upper edge of the arm 2E. The outer side of the finger zl has formed upon'it an upper shoulder 2d and a lower shoulder 25, these shoulders facing down.

wardly.

The lower edge of the strap iron of which the door holding, arm is shown as being constructed is provided in its free end portion with certain I faces and a bevel t l at the inner end of the rest surface As to the rest 32 it may be described as a broad notch having a widening bevel at each end, this notch thus being adapted to overlie an intact portion 3'5 of a rest plate 35 secured flat- Wise' to the outer part of the top surface of the 3 .4 free edge portion of the door I, said rest plate 1y it free end, and an alarm mounted on said having through it an aperture Sufficient door frame, and actuating mechanism for said unobstruct the downswing of thfi arm H i alarm mounted on the door and operamively reclined. downwardly at such times) to allow the m m free end portion f id arm at times rest surface 32 of said arm to 36% W Said 6 to be put into operation thereby, pants of said I Fr a. iillllm n channel shaped clip mounted on a door frame superjacent to a door opening, the open side of said channel shaped clip being directed outwardly from the door frame, the upper side of said clip terminating in a downwardly directed lip having a central notch and an inclined edge at each side of said notch, a door holding arm having an anchored end portion pivoted to said clip within its channel portion to swing both horizontally and vertically, and a spring connected with the attaching means for said door holding arm and at times holding a part of said arm within the aforesaid notch to prevent the arm from bein horizontally swung, the outer part of said arm having shoulder means engageable with the upper edge of a door to prevent outswing of the latter, said arm being manually depressible out of said notch preparatory to swing the arm horizontally to an inoperative position in relation to the door,

7. A combined means for mounting and actuating an alarm comprising a bracket plate or apron attached with one of its faces abutted in a fiatwise manner against a door and supporting adjacent to its opposite face an alarm having an upwardly projecting plunger for its operation, said apron carrying two outwardly extending arms one at each side of said plunger, a lever pivoted to one of said arms and guided in vertical swinging by the other of said arms, said lever normally resting upon the upper end of said plunger with insufficient pressure to set 01f the alarm, and an arm having an inner end portion mounted superjacent to the door opening and an outer end portion positionable to depress said lever when brought into contact therewith by outswinging of the door.

8. Ina construction of the kind described, a

clip mounted on a door frame superjacent to the door opening and adjacent to that side of a door opening which is farthest from the hinges of the door, a door holder arm having an anchored end connected to said clip and .a free end portion adjustable to and from a holding relation to the upper edge portion of said door, means yieldingly acting upon said arm and tending to swing downwardly its free end, an alarm mounted on said door, an actuating mechanism for said alarm mounted on the door and operatively related to the free end portion of said arm at times to be put into operation thereby, said arm having a notch in its lower side in a considerably spaced relation to its outer end to fit over a part of the upper edge of the door to hold the door at a definite outswung position, said notch having a beveled outer end thus allowing a wider forcing open of the door, and an alarm actuating means carried by the door and acted upon by said arm when such wider forcing open of the door occurs.

JAMES E. OLVIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS N umber Name Date 346,194 Coultaus July 27, 1886 517,869 Lawlor Apr. 10, 1894 732,067 Greer June 30, 1903 1,198,153 Rixson Sept, 12, 1916 1,468,460 Di Carlo Sept. 18, 1923 1,636,947 Zukor July 26, 1927 1,853,595 Asbury Apr. 12, 1932 

